意外的闪存安全异常使用的URLLoader当 [英] Unexpected Flash Security Exception When Using URLLoader

问题描述

我试图做到的是使用结合URLLoader类用的URLRequest上传一些二进制数据，具体的ByteArray重新presenting PNG图像，到服务器。

当我设置URLRequest的的contentType 属性的multipart / form-data的，而不是默认情况下，调用 urlLoader.load （）导致安全异常。

当我离开的contentType 属性设置为默认，它工作正常，但需要很长的时间（成比例的PNG文件的长度）将文件上传到服务器

所以，我的问题是，为什么我会收到此安全异常？我怎么能避免呢？

请注意，我的SWF正在提供从开发服务器，而不是本地文件系统（谷歌应用程序引擎开发服务器是precise）。

下面是code：

  VAR pngFile：的ByteArray = PNGEn coder.en code（位图数据）;

VAR的URLRequest：的URLRequest =新的URLRequest（'/ API / uploadImage'）;

//这一行的code，调用URLLoader.load（）方法抛出以下安全异常：
//'引发SecurityError：错误＃2176：某些动作，比如那些显示一个弹出式窗口，只可以通过鼠标点击或按键preSS在用户交互来调用，例如
urlRequest.contentType =的multipart / form-data的;

urlRequest.method = URLRequestMethod.POST;
请将URLRequest.data = pngFile;
urlRequest.requestHeaders.push（新URLRequestHeader（缓存控制'，'无缓存'））;

的URLLoader =新的URLLoader（）;
urlLoader.dataFormat = URLLoaderDataFormat.TEXT;
urlLoader.addEventListener（引发Event.COMPLETE，onUploadComplete）;
urlLoader.addEventListener（IOErrorEvent.IO_ERROR，onUploadError）;

NextFrame.addCallback（函数（）{
对URLLoader.load（的URLRequest）;
}）;
 

解决方案

这可能是可能的，的contentType 指的不是你送什么数据，而是要什么样的数据，你接收。尝试设置 requestHeaders ，这应该工作：

  urlRequest.requestHeaders.push（新URLRequestHeader（内容型，多部分/表单数据））;
 

另外，我发现了一张code凡在我的项目之一。在code ++工程，并将一些二进制的JPEG数据到服务器，使用POST。我DIT它前一段时间，我无法解释为什么我做的事这种方式，但也许它帮助。我粘贴它是：

 功能送出数据（submitPath：字符串，descriere：字符串）：无效{
    //构建HTTP请求上传JPEG到服务器
    VAR标题：的URLRequestHeader =新URLRequestHeader（内容型，应用程序/八位字节流）;
    VAR jpgURLRequest：的URLRequest =新URLRequest(submitPath+'/id/'+player.id+'/path/'+player.contentPath.replace('/','')+'/width/'+player.videoWidth+'/height/'+player.videoHeight+'/descriere/'+descriere+'/timp/'+time);
    jpgURLRequest.requestHeaders.push（头）;
    jpgURLRequest.method = URLRequestMethod.POST;
    jpgURLRequest.data =截图;

    //将数据发送给服务器
    VAR发件人：的URLLoader =新的URLLoader（）;
    sender.load（jpgURLRequest）;
}
 

What I am trying to accomplish is to upload some binary data, specifically a ByteArray representing a PNG image, to a server using the URLLoader class in conjunction with URLRequest.

When I set the contentType property of the URLRequest to 'multipart/form-data' instead of the default, the call to urlLoader.load() results in a security exception.

When I leave the contentType property as the default, it works fine, but takes a long time (proportional to the length of the PNG file) to upload the file to the server.

So, my question is WHY am I getting this security exception? And how can I avoid it?

Note that my SWF is being served up from a development server, not the local filesystem (the Google App Engine development server to be precise).

Here is the code:

var pngFile:ByteArray = PNGEncoder.encode(bitmapData);

var urlRequest:URLRequest = new URLRequest('/API/uploadImage');

// With this line of code, the call to urlLoader.load() throws the following security exception:
// 'SecurityError: Error #2176: Certain actions, such as those that display a pop-up window, may only be invoked upon user interaction, for example by a mouse click or button press.'
urlRequest.contentType = 'multipart/form-data';

urlRequest.method = URLRequestMethod.POST;
urlRequest.data = pngFile;
urlRequest.requestHeaders.push(new URLRequestHeader('Cache-Control', 'no-cache'));

urlLoader = new URLLoader();
urlLoader.dataFormat = URLLoaderDataFormat.TEXT;
urlLoader.addEventListener(Event.COMPLETE, onUploadComplete);
urlLoader.addEventListener(IOErrorEvent.IO_ERROR, onUploadError);

NextFrame.addCallback(function () {
	urlLoader.load(urlRequest);
});

解决方案

It could be possible that contentType does not refer to what data you send, but to what data you receive. Try to set the requestHeaders, that should work:

urlRequest.requestHeaders.push(new URLRequestHeader('Content-type', 'multipart/form-data'));

Also, I've found a piece of code where in one of my projects. The code works and sends some binary JPEG data to the server, using POST. I dit it some time ago and I can't explain why I did the things this way, but maybe it helps. I'm pasting it as is:

function sendData(submitPath:String, descriere:String):void {
    // building the url request for uploading the jpeg to the server
    var header:URLRequestHeader = new URLRequestHeader('Content-type', 'application/octet-stream');
    var jpgURLRequest:URLRequest = new URLRequest(submitPath+'/id/'+player.id+'/path/'+player.contentPath.replace('/','')+'/width/'+player.videoWidth+'/height/'+player.videoHeight+'/descriere/'+descriere+'/timp/'+time);
    jpgURLRequest.requestHeaders.push(header);
    jpgURLRequest.method = URLRequestMethod.POST;
    jpgURLRequest.data = screenShot;

    // sending the data to the server
    var sender:URLLoader = new URLLoader();
    sender.load(jpgURLRequest);
}

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